SPACI score report for 4dc8 in ASTRAL 2.05:

PDB Entry: 4dc8
SPACI score: 0.64
AEROSPACI score: 0.64

Experiment type: XRAY
Resolution: 1.5
R-factor: 0.183
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.576
WCK2 WHAT_CHECK Ramachandran: -0.613
WCK3 WHAT_CHECK Chi angles: -0.504
WCK4 WHAT_CHECK Backbone: 5.765

Note: Here are links to pages about PROCHECK and WHAT_CHECK.

Here is the full WHAT_CHECK report on this protein (linked from the WHAT_CHECK site).